case class SortKey(clikCount: Long, orderCount: Long, payCount: Long) extends Ordered[SortKey] {
	//this.compare(that)
	// compare > 0  this > that
	// compare < 0  this < that
	override def compare(that: SortKey): Int = {
		if (this.clikCount - that.clikCount != 0) {
			return (this.clikCount - that.clikCount).toInt
		} else if (this.orderCount - that.orderCount != 0) {
			return (this.orderCount - that.orderCount).toInt
		} else {
			return (this.payCount - that.payCount).toInt
		}
	}
}
